Bobbin holder



July 1942- J. BLANCHARD 2,288,676

BOBBIN HOLDER File d May 26, 1941 Patented July 7, 1942 v BOBBIN HOLDER Joseph E. Blanchard, Millbury, Mass., assignor to Watson-Williams Manufacturing Company,

Millbury, Mass, a. corporation of Massachusetts Application May 26, 1941, Serial No. 395,226

4 Claims. (01. 139-207) This invention relates to shuttles used in automatic weft replenishing looms and relates more particularly to the means for gripping and holding a bobbin in such a shuttle.

Such holding means commonly comprises a series of rings on the bobbin butt and a bobbinholding spring having a pair of spaced resilient jaws which grip the rings on the bobbin butt when a fresh bobbin is transferred to a shuttle. Such bobbin-holding springs are subject to rather rough treatment during transfer and are difiicult to firmly secure in the shuttle body.

It is the general object of my invention to provide improved means for securing a bobbinholding spring in a shuttle. A further object is to provide means for firmly seating a bobbinholding spring on an underlying bobbin guideplate.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawing, in which Fig. 1 is a partial plan view of a shuttle having my invention embodied therein;

Fig. 2 is a sectional side elevation, taken along the line 22 in Fig. 1 but. with the bobbin omitted;

Fig. 3 is a side elevation of certain parts forming my improved bobbin holder, shown in spaced relation;

Fig. 4 is a plan view of a bobbin guide-plate;

Fig. 5 is a plan view of a bobbin-holding spring; and

Fig. 6 is a transverse sectional elevation, taken and gripped in recesses l2 (Fig. 2) in the inner faces of the spaced resilient jaws 14 of a U-shaped bobbin-holding spring [5.

The end portion of the shuttle S is recessed at 20 (Fig. 6) to snugly receive the closed end portion 2| of the spring [5, and the spring is provided with holes 22 to receive the usual holding screw 23, which is threaded into a nut 24 firmly seated in the side of the shuttle.

The parts thus far described are of the usual commercial construction, as is the bobbin guide 30 shown in Figs. 3 and 4 and having a bottom plate 3|, a top plate 32 and an inclined guiding portion 33.

This bobbin guide 30 is provided with a special hole 34 in the bottom plate 3| and with a special slot 35 in the top plate 32.

The narrowed or left-hand portion of the bottom plate 3| is received in longitudinal slots 40 (Figs. 2 and 6) at the sides of the recess 2|] in the shuttle S, and the narrowed or left-hand portion of the top plate 32 is similarly received in longitudinal slots 42 in the shuttle.

My improved means for firmly securing the bobbin-holding spring I5 in the shuttle S and for firmly seating the spring on the bottom plate 3| of the bobbin guide 30 comprises a screw-eye 44; a nut 45, and a lock washer 46. After the parts are assembled in the shuttle, the nut 45 is tightened on the threaded lower portion 44 of the screw-eye 40 by means of a split screwdriver or other convenient tool. The screw-eye 44 encircles the holding screw 23, which latter extends through the holes 22 in the spring I5.

Consequently, as the nut 45 is tightened, a downward force is exerted through the screweye 44 and screw 23 on the spring l5, and the lower edge of the spring I5 is firmly seated against the upper face of the bottom plate 3| of the bobbin guide 30. 7

Relative vertical movement between the spring and the bottom plate is thus eifeetively prevented and cutting of the spring into the bottom plate, due to lost motion between the parts, is effectively avoided.

In assembling the bobbin holder in the shuttle, the spring [5 and bobbin guide 30 are first assembled as shown in Fig. 3, and these parts are then inserted in the shuttle S, assuming the position shown in Figs. 1, 2 and 6. Thescrew-eye 44 is then inserted through the slot 35, and the threaded lower portion 44 thereof is guided through the hole 34 in the bottom plate 3!. The slot 35 in the top plate 32 is necessary to permit assembly of these parts.

The screw 23 is then inserted through the side wall of the shuttle, the screw-eye 44 being positioned to receive the screw 23 as it is thus inserted. The lock washer 46 and nut 45 are then placed in the position shown in Fig. 6, and the nut 45 is tightened to firmly seat the spring IS on the bottom portion 3|.

The screw 23 is then tightened in the nut 24 and the bobbin holder is then fully assembled and firmly secured in the shuttle.

It will be noted that the spring washer 46 directly abuts the under side of the bottom plate 3|, so that there is no interposed wood which might shrink and allow the parts to loosen. Consequently, the spring {5 will be held firmly seated on the plate 3| during an extended period of use.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:

1. In a shuttle having a bobbin-holding spring and a bobbin guide therefor having a bottom plate underlying said spring, in combination, a clamping screw extending transversely through the shuttle body and through the shank of the bobbin-holding spring, a device positioned between the spaced sides of the spring in the shank portion thereof and engaging and directly coacting with said clamping screw, and means to draw said device and clamping screw downward and to thereby firmly seat said spring on said bottom plate.

2. In a shuttle having a bobbin-holding spring and a bobbin guide therefor having a bottom plate underlying said spring, in combination, a clamping screw extending transversely through the shuttle body and through the shank of the bobbin-holding spring, a screw-eye positioned between the spaced sides of the spring in the shank portion thereof and encircling said clamping screw and extending downward through the bottom plate of said bobbin guide, and means to draw said screw-eye downward and to thereby firmly seat said spring on said bottom plate.

3. In a shuttle having a bobbin holding spring and a bobbin guide therefor having a bottom plate underlying said spring, in combination, a clamping screw extending transversely through the shuttle body and through the shank of the bobbin-holding spring, a screw-eye positioned between the spaced sides of the spring in the shank portion thereof and encircling said clamping screw and extending downward through the bottom plate of said bobbin guide, and means to draw said screw-eye downward and to thereby firml seat said spring on said bottom plate, said latter means directly abutting the under side of said bottom plate.

4. In a shuttle having a bobbin-holding spring and a bobbin-guide therefor having a bottom plate underlying said spring, in combination, a clamping screw extending transversely through the shuttle body and through the shank of the bobbin-holding spring, a screw-eye positioned between the spaced sides of the spring in the shank portion thereof and encircling said clamping screw and extending downward through the bottom plate of said bobbin guide, and means to draw said screw-eye downward and to thereby firmly seat said spring on said bottom plate, said latter means comprising a nut and a lock washer inserted in the shuttle body from the bottom surface thereof and said washer directl abutting the under side of the bottom plate.

JOSEPH E. BLANCHARD. 

